Method of rolling tapered disks



March 10, 1931. KELLEY 1,795,492

METHOD OF ROLLING TAPERED DISKS Filed Nov. 23 1926 IQNVENTOR. GEORGE L. KELLEY ATTORNEY; 7

BY yam/.

Patented Mar. 10, 193E UNITED STATES :PATENT OFFICE GEORGE L. KELLEY, OE PHILADELPHIA; PEN NSYLVAiNIA, ASSIGN'OR TO BUDD WHEEL COMPANY, OF PHILADELPHIA, PENNS VANIA YLVANIA, A CORPORATION OF PENNSYL- METHOL OF ROLLING 'IAPERED DISKS Application filedzlTovember 23, 1926. Serial No. 150,242.

l The present invention provides an improved method of rolling, disk-shaped bodies. Another object is the provision of a method whereby relatively thin disks may be rolled to a tapered form preferably from cold substantially fiat blanks.

A third object attained by the present in vention is a method of rolling disks whereby a superior finish may be given to both sides of the product.

The method also utilizes less power than previous systems, and hence is more economical.

The method is also, tended for cold rolling, a hot rolling process.

Other objects and advantages will appear from the following description and the attached drawings, which comprise:

Figures 1 and 2, diagrammatic representations of the rolling elements used in carrying out this method, Figure 1 being the initiation of the process, Figure 2, the conclusion.

Two pairs, 1, 2 of rolls are provided. These while primarily inpeculiarly suited to rolls comprise cylindrical, relatively narrow tread portions, and adjacent conical portions. Means are provided to separate the cooperating rolls of each pair to permit the insertion of the blank B 'therebetweem-ancl to bring them together again in forcible contact with each side of the blank at opposite sides of the center thereof and equidistant therefrom. Further means are provided to cause a gradual traverse of the pairs of rolls l, 2 simultaneously outward of the disk in the directrons of the arrows, 3, 4 respectively. This same latter means may also be adapted to re turn the rolls to their central position in preparation for a repetition of the cycle.

When the rolls of each pair. occupy their central positions, as in Figure 1, but separated, a blank B is' inserted therebetween. The rolls are then brought into forcible engagement with the blank and rolling is begun with the rollsv rotating in the directions indicated by their adjacent arrows. A central rotary guide and support may be provided for the blank B, when necessary.

Following contact with the blank, the

gradual outward traverse of the rolls begins lar. to Figure 2.

' With the axes of the rolls of each pair parallel, and aligned or parallel to those of the opposite pair, the action will be of a thinning and finishing nature. .If the rolls of each pair have non-parallel or non-aligned axes, tapered shapes will be rolled from the flat blank.

By providing a similar departure of the axes of each pair from alignment, conical shapes of uniform thickness are produced.

Finally, there may arise a condition in which one pair of rolls are of rounded contour, forfinishing purposes, the other pair serving as roughing rolls. In this case, the finishing rolls would operate at a less radial distance from the center of the blank unit than the roughing rolls, thus covering and eliminating any marks left by them.

Since the outward traverse of the rolls is gradual andtheir areas of contact with the blank small, the resulting rolling and outward spinning action displaces only a small amount of metal at a time. This gradual adjusted. The power demanded by this gradual easy working is much less than that used in previous methods. This small area of contact while well suited for cold rolling, also especially adapts the mill for use in hot working of metal, since thereby the loss of heat by conduction is lessened.

Obviously the process may be carried out until the rolls leave the finished disk, or may be discontinued sooner, leaving part of the disk unroll'ed.

The above variations fall within the scope of this invention and are to be included therewith, as well as any others which may be covered by the appended claim.

I claim:

1. The method of making thin tapered disks from substantially flat metal stock which consists in simultaneously rolling and spinning opposite faces of the blank in spiral progres-.

sion from the center outwardly, the while pand.

2. The method of making thin tapered disks from substantially flat metal stock which consists in projecting opposite narrowfaced rolls into rolling contact with a blank adjacent its center and on opposite faces thereof, then moving the rolls outwardly simultaneously to roll and spin the surface of the bank on opposite sides thereof, the while leaving the periphery of the blank free to expand.

3. The method of making thin tapered disks from substantially fiat metal stock which consists in projecting at least two pairs of opposed narrow-faced rolls into rolling and spinning contact with a blank adjacent its center and on the opposite faces thereof, then rotating at least'one pair of said rolls While traversing opposed pairs of rolls outwardly at the same speed to roll and spin both faces of the blank, the While leaving the periphery of the blank free to expand.

4. The method of making thin tapered disks from substantially fiat metal stock which consists in simultaneously bringing a pair of narrow-faced rolls into rolling and spinning contact with the oppositefaces of the blank, then traversing said rolls outwardly at uniform speed and along axes slightly inclined toward each other, While positively driving at least one of said rolls to rotate the blank and cause the rolls to travel over its opposite faces along a spiral path to thereby roll and spin said faces, the while leaving the periphery of the blank substantially free to expand.

In testimony whereof he hereunto aflixes his signature.

GEORGE L. KELLEY. 

